Fix unit tests

[johlju]

Pull Request (PR) description

• Fixed unit tests to easier run test both from command line and inside
  Visual Studio Code.

This Pull Request (PR) fixes the following issues

None.

Task list

• Added an entry to the change log under the Unreleased section of the
  file CHANGELOG.md. Entry should say what was changed and how that
  affects users (if applicable), and reference the issue being resolved
  (if applicable).
• Documentation added/updated in README.md.
• Comment-based help added/updated for all new/changed functions.
• Localization strings added/updated in all localization files as appropriate.
• Examples appropriately added/updated.
• Unit tests added/updated. See DSC Community Testing Guidelines.
• Integration tests added/updated (where possible). See
  DSC Community Testing Guidelines.
• New/changed code adheres to DSC Community Style Guidelines.

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This change is 

[codecov]

Codecov Report

Merging #95 (04b0779) into main (052cfde) will not change coverage.
The diff coverage is n/a.

@@        Coverage Diff         @@
##           main   #95   +/-   ##
==================================
  Coverage    91%   91%           
==================================
  Files        31    31           
  Lines       568   568           
==================================
  Hits        519   519           
  Misses       49    49           

[johlju]

Reviewed 28 of 28 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @johlju)